(19)
(11) EP 4 246 122 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
15.11.2023 Bulletin 2023/46

(43) Date of publication A2:
20.09.2023 Bulletin 2023/38

(21) Application number: 23190933.4

(22) Date of filing: 30.08.2013
(51) International Patent Classification (IPC): 
B01D 11/02(2006.01)
 G01N 1/40(2006.01)
(52) Cooperative Patent Classification (CPC):
B01D 11/0219; B01D 11/0203; G01N 1/4055
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30) Priority: 30.08.2012 US 201213599837

(62) Application number of the earlier application in accordance with Art. 76 EPC:
13766421.5 / 2890469

(71) Applicant: Dionex Corporation
Sunnyvale, CA 94085 (US)

(72) Inventors:
  • SRINIVASAN, Kannan
    Tracy, 95377 (US)
  • ULLAH, Sm, Rahmat
    Fremont, 94539 (US)

(74) Representative: Boult Wade Tennant LLP 
Salisbury Square House 8 Salisbury Square
London EC4Y 8AP
London EC4Y 8AP (GB)

   


(54) METHOD AND DEVICE TO EXTRACT AN ANALYTE FROM A SAMPLE WITH GAS ASSISTANCE


(57) A method of extracting an analyte from a sample is described. The sample is added to a sample container. A liquid solvent and a gas are added into the sample container. The addition of the gas is controlled to establish an elevated pressure within the sample container. The liquid solvent is heated to an elevated temperature that is below the boiling temperature of the liquid solvent at the elevated pressure. A type of gas is used that does not transition to a supercritical fluid at the elevated temperature and pressure used in the extraction process. The analyte can dissolve from the solid sample into the liquid solvent. Next, at least a portion of the liquid solvent containing the dissolved analyte can be removed from the sample container for subsequent analysis.







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